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time settings have not been entered, dates for log entries will use total
system usage time values, expressed in the form T000001 (total usage
time of one hour)
7.2.5 Password
Instrument calibration and hardware related settings are performed using
the calibration support group functions. Password security is provided to
prevent operators from changing these settings. Passwords are set to
“00000” when shipped from the factory, but customers (instrument
administrators) can change it freely. In the event a customer forgets a
changed password, perform the following.
① Startup the instrument in special mode
② Enter “00000” for the password setting (the special mode allows either
the correct password or 00000)
③ Set a new password
7.2.6 Absorbance compensation factor (ABS COMP)
This is a correction factor used to compensate for differences in
absorbance resulting from variations in hardware between SPD
instruments (such as flow cell length). For example, if a coefficient of 0.9
is entered, absorbance will increase by about 11 percent (1/0.9 = factor of
1.111), but a setting of 1.000 should normally be used.
7.2.7 Automatic leak sensor correction (LEAK CALIB)
This feature automatically corrects for differences in sensitivity between
the measurement side leak sensor and reference side leak sensor. If the
leak sensors are left dry, ”LEAK CALIB” is displayed and the Enter key is
pressed, then the leak sensors will be calibrated automatically. Always
execute the ”LEAK CALIB” function after replacing a leak sensor.
7.2.8 Leak sensor threshold level (LEAK THR)
The threshold level is determined according to the following procedure.
(The “XXX” portion of “ActLv XXX/255” is read as the threshold value.)
① Read leak sensor output with no leakage. (A)
② Dribble water on the leak sensor and read its output. (B)
③ Add a value that is about 0.7 times the difference between reading A
and B to A, and set it as the threshold value.
A + 0.7× (B - A)
CAUTION
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